Index: include/pthread.h
===================================================================
--- include/pthread.h
+++ include/pthread.h
@@ -209,9 +209,14 @@
 int		pthread_cond_wait(pthread_cond_t * __restrict,
 		    pthread_mutex_t * __restrict __mutex)
 		    __requires_exclusive(*__mutex);
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wbuiltin-requires-header"
 int		pthread_create(pthread_t * __restrict,
 		    const pthread_attr_t * __restrict, void *(*) (void *),
 		    void * __restrict);
+#pragma clang diagnostic pop
+
 int		pthread_detach(pthread_t);
 int		pthread_equal(pthread_t, pthread_t);
 void		pthread_exit(void *) __dead2;